<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>
    
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

       <el-button type="text" @click="openChapterDialog()">添加章节</el-button>

    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}

                 <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>

            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}

                <span class="acts">
                    
                    <el-button style="" type="text"  @click="updateVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

        <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
        <el-form :model="video" label-width="120px">
            <el-form-item label="课时标题">
                <el-input v-model="video.title"/>
            </el-form-item>
            <el-form-item label="课时排序">
                <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
            </el-form-item>
            <el-form-item label="是否免费">
                <el-radio-group v-model="video.free">
                    <el-radio :label="true">免费</el-radio>
                    <el-radio :label="false">默认</el-radio>
                </el-radio-group>
            </el-form-item>

              <el-form-item label="上传视频">
                <el-upload
                    :on-success="handleVodUploadSuccess" 
                    :on-remove="handleVodRemove"
                    :before-remove="beforeVodRemove"
                    :on-exceed="handleUploadExceed"
                    :file-list="fileList"
                    :action="BASE_API+'/eduvod/video/uploadAlyVideo'"
                    :limit="1"
                    class="upload-demo">
                <el-button size="small" type="primary">上传视频</el-button>
                <el-tooltip placement="right-end">
                    <div slot="content">最大支持1G，<br>
                        支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                        GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                        MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                        SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
                    <i class="el-icon-question"/>
                </el-tooltip>
                </el-upload>    
            </el-form-item>
            
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
            <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
        </div>
    </el-dialog>
  </div>

</template>
<script>

import video from '@/api/edu/video'
import chapter from '@/api/edu/chapter'

export default {
    data(){
        return {
            saveBtnDisabled:false,
            courseId:'',
            chapterVideoList:[],
            chapter:{ //封装章节数据
                title:'',
                sort:0
            },
            video: {
                title: '',
                sort: 0,
                free: 0,
                videoSourceId: '',
                videoOriginalName :'' //上传视频的名称
            },
            dialogChapterFormVisible:false, //章节弹框
            dialogVideoFormVisible:false, //小节弹框
            
            fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API // 接口API地址,localhost:9001这个地址
        }
    },
    created(){
        //获取路由的id值
        if(this.$route.params && this.$route.params.id){
            this.courseId = this.$route.params.id
            //根据课程id查询章节和小节列表
            this.getChapterVideo()
        }

    },
    methods:{
        //点击确定调用的方法
        handleVodRemove() {
            //调用接口的删除视频的方法
            video.deleteAliyunvod(this.video.videoSourceId)
                .then(response =>{
                    //1，提示信息
                    this.$message({
                    type: 'success',
                    message: '删除视频成功!'
                });
                //把文件列表清空
                this.fileList = []
                //把video视频id和视频名称值清空
                this.video.videoSourceId = ''
                this.video.videoOriginalName = ''
                })
        },

        //点击×调用这个方法
        beforeVodRemove(file,fileList) {
            return this.$confirm(`确定移除 ${ file.name }？`);
        },

        //上传视频成功调用的方法
        handleVodUploadSuccess(response,file,fileList){
            this.video.videoSourceId = response.data.videoId
            alert(this.video.videoSourceId)
            this.video.videoOriginalName = file.name
        },

        //上传之前调用的方法
        handleUploadExceed(){
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },

//=====================================小节操作==================================================
        openVideo(chapterId){
            this.dialogVideoFormVisible = true
            //每次打开弹窗清空列表
            this.video = {}
            //设置章节id
            this.video.chapterId = chapterId
            
        },

        //点击确定弹窗
        saveOrUpdateVideo(){
            if(!this.video.id){
                //添加小节
                this.addVideo()
            }else{
                this.updateVideo2()
            }
        },

        //添加小节
        addVideo(){
            //设置课程id
            this.video.courseId = this.courseId
            video.addVideo(this.video)
            .then(response =>{
                //1，关闭弹框
                this.dialogVideoFormVisible=false, //小节弹框
                //2，提示信息
                this.$message({
                    type: 'success',
                    message: '添加小节成功!'
                });
                //3，刷新页面
                this.getChapterVideo()
            })
        },

        //删除小节
        removeVideo(videoId){
            this.$confirm('是否删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'})
                    .then(() =>{
                        video.deleteVideo(videoId)
                            .then(response =>{
                            //1，关闭弹框
                            this.dialogVideoFormVisible=false, //小节弹框
                            //2，提示信息
                            this.$message({
                                type: 'success',
                                message: '删除小节成功!'
                            });
                            //3，刷新页面
                            this.getChapterVideo()
                    })
                })
        },

        //修改小节弹窗数据回显
        updateVideo(videoId){
            this.dialogVideoFormVisible=true //小节弹框
            video.getVideo(videoId)
                .then(response =>{
                    this.video = response.data.eVideo
                })
        },

        //修改小节的方法
        updateVideo2(){
            video.updateVideo(this.video)
                .then(response =>{
                     //1，关闭弹框
                    this.dialogVideoFormVisible=false,
                    //2，提示信息
                     this.$message({
                        type: 'success',
                        message: '修改小节成功!'
                    });
                    //3，刷新页面
                    this.getChapterVideo() 
                })
        },

//=====================================章节操作==================================================
         //删除章节
        removeChapter(chapterId) {
            this.$confirm('此操作将删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
            })
            .catch(error =>{ //请求失败
                    alert("error")
                }) //点击取消，执行catch方法
        },

        //修改章节弹窗数据回显
        openEditChatper(chapterId){
            //弹窗
            this.dialogChapterFormVisible=true, //章节弹框
            //调用接口
            chapter.getChapter(chapterId)
                .then(response =>{
                    this.chapter = response.data.chapter
                })
        },

        //弹出添加章节页面
        openChapterDialog(){
            //弹窗
            this.dialogChapterFormVisible=true //章节弹框
            //表单数据清空
            this.chapter.title = '',
            this.chapter.sort = 0
        },

        //添加章节
        addChapter(){
            //设置课程id到chapter对象里面
            this.chapter.courseId = this.courseId
            chapter.addChapter(this.chapter)
                .then(response =>{
                    //1，关闭弹框
                    this.dialogChapterFormVisible=false, //章节弹框
                    //2，提示信息
                     this.$message({
                        type: 'success',
                        message: '添加章节成功!'
                    });
                    //3，刷新页面
                    this.getChapterVideo()
                })
        },

        //修改章节的方法
        updateChapter(){
            chapter.updateChapter(this.chapter)
                .then(response =>{
                     //1，关闭弹框
                    this.dialogChapterFormVisible=false, //章节弹框
                    //2，提示信息
                     this.$message({
                        type: 'success',
                        message: '修改章节成功!'
                    });
                    //3，刷新页面
                    this.getChapterVideo() 
                })
        },

        saveOrUpdate(){
            if(!this.chapter.id){
                this.addChapter()
            }else{
                this.updateChapter()
            }  
        },

        //根据课程id查询章节和小节列表
        getChapterVideo(){
            chapter.getAllChapterVideo(this.courseId)
            .then(response =>{
                this.chapterVideoList = response.data.allChapterVideo
            })
        },

        previous(){
            //跳转到上一步
            this.$router.push({path:'/course/info/'+this.courseId})
        },
        next(){
            //跳转到下一步
            this.$router.push({path:'/course/publish/' +this.courseId})
        }
    }
}
</script>
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>